Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 408 discussion

Loosely coupled = SQS - Lambda is also the simplest to use

option B

Using an Amazon SQS queue (option B) and an AWS Lambda function is the most reliable approach for several reasons: Scalability: AWS Lambda can automatically scale based on incoming requests, ensuring that orders are processed quickly even during peak traffic. High availability: By using a message queue like SQS, orders are stored temporarily until they can be processed, ensuring that no orders are lost due to system failures. Loosely coupled architecture: The use of an SQS queue and Lambda function decouples the order processing from the storage (Amazon DynamoDB) in a separate logical layer, making it easier to scale and maintain individual components independently. Handling sporadic traffic patterns: AWS Lambda provides a serverless computing experience that automatically scales based on demand, making it well-suited for handling variable workload spikes.

Option B

Answer is C Order processing is a multi-step cycle not a two step one. Stepfunction and ECS is the most reliable way to go.

Option B

Selected Answer: B -- SQS for sure coz you can't take a chance of loosing data.

". The application is responsible for receiving and processing orders before storing them in an Amazon DynamoDB table." We can't assume, without further information, that it's a multistep action. For now, it just processes one order and send info to Dynamo. Looks reasonable to use SQS+Lambda for a loosely coupled solution B

Here is an example of a Step Function for a simple order flow. You can see how many lambda functions will be necessary that can't be replaced by a single SQS and Lambda https://dev.to/aws-builders/aws-step-functions-simple-order-flow-6gn

Answer is C Order processing is a multi-step cycle not a two step one.

Answer B

B is correct

B for sure

B for sure